JPH09239534A - Table device for thermal cutting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the working efficiency, and to secure the safety by moving a table horizontally and vertically along upper and lower horizontal guides, semi-circular end guide, and a center connection guide in cutting a plate by a thermal cutting machine. SOLUTION: A table guide 45 comprises upper and lower horizontal guides 51U, 51L which are horizontally provided in two stages in the vertical direction, and semi-circular right and left end guides 53L, 53R of the same sectional shape to smoothly connect each end to make an endless guide of oblong shape as a whole. A pair of right and left center connection guides 55L, 55R of the same sectional shape to connect center parts of the upper and lower horizontal guides 51U, 51L are provided in parallel to the end guides 53L, 53R. The center connection guides comprise a fixed guide 57 which is fixed to a base frame 43 in the center and turnable rotary guides 59U, 59R provided in the vertical direction across the guide 57.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a table device for a thermal cutting machine, and more particularly to a shuttle table type table device for a thermal cutting machine having a plurality of machining tables that can be exchanged.

[0002]

2. Description of the Related Art Conventionally, when a large number of workpieces are machined in a laser beam machine, for example, as a thermal cutting machine, the workpieces are placed on a machining table and / or provided above the workpieces. The laser processing head is moved appropriately, and a laser beam is emitted from the laser processing head toward the work to perform cutting processing on the work.

Next, after the processed work is removed from the processing table and carried out, the next work to be processed is placed on the processing table and the work is cut and processed in the manner described above. In this way, the work to be machined is placed on the machining table, and the work of machining the work by the laser machining head is repeated, thereby performing the laser machining on many works.

However, since the table device in the conventional laser processing machine described above uses only one processing table, the time during which the worker sets the work and the time when the processed work is removed from the processing table is reduced. The laser processing machine was in a stopped state, and productivity could not be improved.

In order to improve the productivity, the setup time has to be shortened, and the burden on the operator has increased. Further, in order to reduce the burden on the operator, it is necessary to attach a dedicated loading / unloading device. Then, the cost becomes high.

Therefore, a table device for a thermal cutting machine, which is designed to improve productivity during laser processing, is disclosed in, for example, Japanese Patent Publication No. 5-65273.

[0007]

By the way, in the table device for the thermal cutting machine known in the above publication,
The first table is movably provided between the two positions on the fixed guide means, and the second table is movably provided between the two positions on the moving guide means provided so as to be vertically movable. It is characterized in that table driving means is provided between the second tables.

In this table device, while the first and second tables are provided and the laser processing is performed on the work on the first table, the processed work on the second table is removed and the next work is removed. In order to raise and lower the second table, the moving guide means is moved up and down, and a large capacity lifting means must be used. Further, the table drive means for moving the first and second tables uses two sets of drive transmission means, which employs a complicated mechanism and is costly.

An object of the present invention is to provide a plurality of machining tables which can be exchanged so as to reduce the cycle time by performing setup of the next machining work during machining and simplifying the mechanism for moving the machining table. Also, by providing a table area for a thermal cutting machine that can secure the operator's safety from the laser beam by setting the movement range for the operator to be outside the light irradiation range of the laser processing machine. To do.

[0010]

In order to achieve the above object, a table device for a heat cutting machine according to a first aspect of the invention is a heat cutting machine for supporting a plate material to be cut by the heat cutting machine. And a table moving mechanism for horizontally moving and vertically moving the table while holding the table in a horizontal state while holding the plate at a predetermined interval. The table guide has an overall oval shape that is supported so as to be movable in the horizontal and vertical directions. The table guide has two upper and lower horizontal guides, and both ends of the upper and lower horizontal guides are smoothly connected vertically. And a semi-circular end guide, and a central connecting guide having a substantially same shape as the end guide, which is located at the center of the horizontal guide and is capable of connecting the upper and lower horizontal guides. It is an feature.

Therefore, when the plate material is cut by the thermal cutting machine, the table moving mechanism moves the plate material horizontally or vertically while holding a plurality of empty tables horizontally. At this time, the table is moved and positioned between the machining position and the setup position by orbiting at a constant speed on the overall oval table guide along the upper and lower horizontal guides and the semicircular end guide. It Also, when the table moves up and down along the end guides, the part that supports the table does not move along the end guides.
It moves up and down along the central connecting guide that connects the upper and lower horizontal guides in the central portion of the horizontal guide.

A table device for a thermal cutting machine according to a second aspect of the present invention is characterized in that the table according to the first aspect has wheels near four corners, and the wheels move along the table guide. Is.

Therefore, since the wheels provided at the four corners of the table move along the table guide, the table moves between the machining position and the setup position by rotating.

According to a third aspect of the present invention, there is provided a table device for a heat cutting machine, wherein the central connecting guides according to the first and second aspects are provided substantially parallel to the respective end guides at the front and rear wheel intervals provided on the table. And a fixed guide fixedly provided at the center of the upper and lower sides, and rotatably provided on both upper and lower sides of the fixed guide in order to connect or disconnect the fixed guide and the horizontal guide. And a rotation guide.

Therefore, since the central connecting guide is provided in parallel with the end guides at the wheel intervals provided on the table, one wheel moves vertically along the end guides and at the same time the other wheel moves. Move vertically along the center connecting guide. Therefore, the table moves up and down while maintaining the horizontal state. Further, since the central connecting guide and the end guide are smoothly connected to the horizontal guide, the table moves up and down without reducing the moving speed of the table.

In a table device for a thermal cutting machine according to a fourth aspect of the present invention, the table moving mechanism according to the first, second and third aspects is provided concentrically with the end guide and at least one is rotationally driven by a drive motor. And a chain which is wound between the sprockets and is rotatable around the inside of the horizontal guide and the end guide, and the chain is attached to a wheel position on the front side in the moving direction of the table. It is characterized by being.

Therefore, the chain of the table moving mechanism is wound between sprockets provided concentrically with the semicircular end guide, and moves along the insides of the horizontal guide and the end guide. Since the wheel position on the front side in the traveling direction of the table is fixed, the table revolves by rotating the chain.

According to a fifth aspect of the present invention, there is provided a table device for a thermal cutting machine, wherein among the wheels according to the first aspect, a wheel on the front side in the traveling direction has a central connecting guide in which the rotary guide is in a cut state. After passing, the rotation guide is rotated to be connected to the fixed guide.

Therefore, after the wheel on the front side in the traveling direction of the table passes through this rotary guide along the horizontal guide having the rotary guide as a part of the horizontal guide side, before the wheel on the rear side of the table reaches the rotary guide. Rotate the rotation guide to connect with the fixed guide of the central connection guide. This causes the wheels on the front side of the table to move along the end guides and the wheels on the rear side of the table to move along the central connecting guide.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 5 shows the entire laser processing machine 35 as a thermal cutting machine using the table device 33 for the thermal cutting machine according to the present invention.

Referring to FIG. 5, a portal-shaped processing machine main body 37 is provided upright, and the processing machine main body 37 is irradiated with a laser beam LB reflected by a bend mirror BM (see FIG. 1). A processing head 41 is provided which is equipped with a nozzle 39 for performing laser processing and is movable and positionable in the X-axis, Y-axis, and Z-axis directions.

A base frame 43 extending in the X-axis direction is provided below the processing machine body 37. Referring also to FIG. 1, both side surfaces of the base frame 43 (both side surfaces in the direction orthogonal to the paper surface in FIG. 5) are provided with elliptical table guides 45, which will be described in detail later, in the X-axis direction. The first and second shuttle tables 47F and 47S on which the work W is placed are reciprocated and moved up and down along the table guide 45 to exchange the work. An NC control panel 49 is provided near the processing machine body 37.

Referring to FIG. 1, the table guide 4
Reference numeral 5 denotes upper and lower horizontal guides 51U and 51L that are horizontally provided in upper and lower two stages, and upper and lower horizontal guides 51U and 5L.
The left and right end guides 53L and 53R, which are semi-circular in shape and have the same cross-sectional shape to smoothly connect both ends of 1L, are formed into an oval shape as a whole to form an endless guide. Further, a pair of left and right central connecting guides 55L and 55R having the same cross-sectional shape and connecting the central portions of the upper and lower horizontal guides 51U and 51L to each other are provided in parallel with the end guides 53L and 53R.

Referring to FIGS. 1 and 2, the central connecting guides 55L and 55R are the upper and lower horizontal guides 51, respectively.
It is located equidistant from the center of U and 51L, and is provided so as to bulge outward. This center connection guide 55
L and 55R are fixed guides 57 fixedly provided on the base frame 43 at the center, and the fixed guides 57.
Rotatable rotation guides 5 provided above and below sandwiching
It consists of 9U and 59L.

The rotation guides 59U and 59L have their centers of rotation 61 at the upper and lower horizontal guides 51U and 51L, respectively, and by rotating, the central connecting guide 55L and
It becomes a part of 55R or a part of the horizontal guides 51U and 51L. Therefore, the rotation guides 59U, 5
The shape of 9L may be, for example, a partial arc shape, but if the lengths of the rotation guides 59U and 59L are somewhat smaller than the radius of the circle, a straight line may be used instead.

Referring to FIG. 3, the horizontal guide 51
U, 51L, end guides 53L, 53R, center connecting guides 55L, 55R, etc. all have the same cross section, and a wide wheel space 63 provided on the shuttle table 47F, 47S side and this wheel space 63. Outside (Fig. 3
It has a narrow chain space 65 provided on the middle left side).

On the other hand, referring to FIGS. 1 and 3, noise prevention is performed on the left and right side surfaces 67 (both sides in the direction orthogonal to the paper surface of FIG. 1) near the front and rear ends of the first and second shuttle tables 47F, 47S. From the viewpoint, the wheels 69 made of urethane, MC nylon, etc. are rotatably provided, and the first and second shuttle tables 47F, 47S are moved along the wheel spaces 63 in the above-mentioned guides. Supports freely. The distance DR between the front and rear wheels 69 is equal to the distance DG between the end guides 53L and 53R and the central connecting guides 55L and 55R.

Inside the end guides 53L, 53R, the sprocket 71L,
71R are provided, and the rotary shaft 73 or the drive shaft 7 is provided.
5 attached. The drive shaft 75 is rotationally driven by a drive motor (not shown).

A chain 77 is wound around the left and right sprockets 71L and 71R, and is rotated by a right sprocket 71R that rotates integrally with a drive shaft 75 that is rotationally driven by a drive motor.

The chain 77 is the first shuttle table 4
It is attached to the front wheel 69 in the traveling direction of 7F (the left wheel 69L position when traveling to the left side in FIG. 4, the right wheel 69R position when traveling to the right side), and is symmetrical with the first shuttle table 47F. A front wheel 69 in the traveling direction of the second shuttle table 47S (similar to the case of the first shuttle table 47F) is attached to the position (the point farthest from the one point).

Therefore, the mounting positions of the first and second shuttle tables 47F, 47S on the chain 77 are determined by the traveling direction. As a result, when the chain 77 travels as described above, both the first and second shuttle tables 47F and 47S are moved / positioned in the X-axis direction and the Z-axis direction.

Next, the operation of the shuttle tables 47F and 47S will be described with reference to FIGS.

First, as shown in FIG. 4 (A), the work W _A to be machined is placed on the first shuttle table 47F at the setup position T to perform setup. At this time, the second shuttle table 47S is located at the processing position K in an empty state.

When the cutting process is started, the NC control panel 49 releases the fixing of the shuttle tables 47F and 47S and rotationally drives the sprocket 71R by a drive motor (not shown) to rotate the chain 77 in the hour hand direction.
The first shuttle table 47F is moved to the left in the X-axis direction, and at the same time, the second shuttle table 47S is moved to the right. At this time, the rotation guides 59U and 59L of the central coupling guides 55L and 55R are tilted down to form a part of the horizontal guides 51U and 51L.

Referring to FIG. 4B, when the wheels 69 on the front side in the traveling direction of the first and second shuttle tables 47F and 47S pass through the central connecting guide 55, the rotation guides 59U and 59L of the central connecting guide 55. Cause all.

Referring to FIG. 4C, at the same time that the front wheels 69 of the first and second shuttle tables 47F, 47S reach the end guides 53L, 53R, the other wheels 69 are As it reaches the central connecting guide 55, the first shuttle table 47F moves up in parallel, and the second shuttle table 47S starts moving down in parallel. When each shuttle table 47F, 47S reaches a predetermined height position, the NC control panel 49 controls the drive motor to reduce the traveling speed of the roller chain 77 to stop each shuttle table 47F, 47S and fix it at a predetermined position. .

As shown in FIG. 4D, the first shuttle table 47F is thus arranged on the upper horizontal guide 51.
When it reaches U and the second shuttle table 47S reaches the lower horizontal guide 51L, the NC control panel 49 returns the rotation guides 59U, 59L of the central connecting guide 55 to make them part of the horizontal guides 51U, 51L. At the same time, when the first shuttle table 47F is positioned at the processing position K, NC
The control board 49 moves and positions the machining head 41 in the X-axis, Y-axis and Z-axis directions, and the laser beam L from the nozzle 39.
B is irradiated and the work W _A is cut.

While the workpiece W _A is being cut, the second shuttle table 4 at the setup position T
The work W _B to be processed next is set in 7S. Work W
_When the cutting of _A is completed, the NC control board 49 causes the drive motor to move the roller chain 77 in the hour hand direction again to move the first shuttle table 47F to the setup position T in the same manner as described above. The second shuttle table 47S is moved to the processing position K. afterwards,
The processed work W _A is carried out from the first shuttle table 47F at the setup position T and a new work W _A is set.

From the above results, the first and second shuttle tables 47F and 47S can be horizontally moved and vertically moved without lowering the moving speed, so that the works W can be exchanged quickly.

Further, while the work W _A on one shuttle table 47F is being cut, the next work W _B can be set on the other shuttle table 47S in parallel outside the laser beam irradiation range. Therefore, the work efficiency can be improved and the work can be performed safely.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. That is, in the above-described embodiment, each shuttle table 47F, 47F.
Although S is moved by the chain 77, the same effect can be obtained by using a belt or a wire instead.

Further, the case where there are two shuttle tables 47F and 47S has been described, but the same can be applied to the case where there are more than two shuttle tables.

Further, in the above-mentioned embodiment, the shuttle tables 47F and 47S are moved in the hour hand direction, but the same is true even if they are moved in opposite directions.

Further, the laser cutting machine 35 is given as an example of the thermal cutting machine in the above-mentioned embodiment, but it can be applied to a plasma processing machine.

Furthermore, in the above-described embodiment, the shuttle tables 47F and 47S are provided with the wheels 69 in the front and rear rows.
In addition to this, a single row of central connecting guides 55 is provided in parallel with the end guides 53. However, the wheels 69 of the shuttle tables 47F and 47S are arranged in three rows, and the parallel central connecting guides of the end guides 53 are provided. Even if two rows of 55 are provided, the same action and effect can be obtained. In this case, the number of supporting points of the shuttle tables 47F and 47S is increased, so that the parallelism and the stability are increased. It is also possible to further increase the number of rows of wheels 69 and the number of central connection guides 55.

[0047]

As described above, in the table device for a thermal cutting machine according to the invention of claim 1, when the plate material is cut by the thermal cutting machine, the table moving mechanism mounts the plate material or empties it. Horizontally moving and vertically moving while holding a plurality of tables horizontally. At this time, the table is moved and positioned between the machining position and the setup position by orbiting at a constant speed over the entire oval table guide along the upper and lower horizontal guides and the semicircular end guide. Therefore, it is not necessary to decelerate when moving from horizontal movement to vertical movement, and smooth table movement can be performed. Further, while the plate material placed on one table is being processed, the plate material can be set on another table outside the processing area, so that the working efficiency is improved and the safety is secured. Furthermore, when the table moves up and down along the end guides, the part that supports the table that does not move along the end guides is the central connecting guide that connects the upper and lower horizontal guides in the central part of the horizontal guide. Since the table moves vertically, the table can be moved horizontally and vertically while maintaining the horizontal state of the table.

In the table device for the thermal cutting machine according to the second aspect of the present invention, the wheels provided at the four corners of the table move along the table guides, so that the table is rotated to move between the processing position and the setup position. Will be moved. At this time, since the table guide has an oval shape, the table guide can be smoothly moved from horizontal movement to vertical movement without deceleration.

In the table device for the heat cutting machine according to the invention of claim 3, since the central connecting guide is provided in parallel with the end guides at the wheel intervals provided on the table, one wheel is provided with the end guides. The other wheel moves vertically along the central connecting guide. Therefore, the table can move up and down while maintaining the horizontal state. Further, since the central connecting guide and the end guide are smoothly connected to the horizontal guide, the table can be moved horizontally and vertically without slowing down the moving speed of the table, and the moving time of the table can be shortened.

In the table device for the thermal cutting machine according to the invention of claim 4, the chain of the table moving mechanism is wound between sprockets provided concentrically with the semicircular end guide, and the horizontal guide and the end are provided. Although it moves along the inside of the guide, the wheel position on the front side of the table in the traveling direction of the table is fixed to this chain, so the table moves circularly and moves between the processing position and the setup position due to the rotational traveling of the chain. be able to.

In the table device for the thermal cutting machine according to the invention of claim 5, after the wheel on the front side in the traveling direction of the table passes through the rotary guide along the horizontal guide having the rotary guide as a part of the horizontal guide side, , The wheel on the front side of the table moves along the end guides as it rotates with the fixed guide of the central connecting guide before the wheel on the back side of the table reaches the rotating guide, so that the wheel on the rear side of the table moves. The wheels will move along the central connecting guide. As a result, horizontal movement and vertical movement of the table can be smoothly performed while maintaining the horizontal state.

[Brief description of drawings]

FIG. 1 is a side view showing a table device for a thermal cutting machine according to the present invention.

FIG. 2 is an enlarged view showing details of a center connection guide.

FIG. 3 is a sectional view showing a relationship between a table guide and a shuttle table.

FIG. 4 is a step diagram showing movement of the shuttle table and movement of the central coupling guide corresponding to this movement.

FIG. 5 is a side view showing the entire laser processing machine to which the table device for a thermal cutting machine according to the present invention is applied.

[Explanation of symbols]

 33 Table Device for Heat Cutting Machine 35 Laser Processing Machine (Heat Cutting Machine) 45 Table Guide 47 Shuttle Table 51 Horizontal Guide 53 End Guide 55 Central Connection Guide 57 Fixed Guide 59 Rotation Guide 69 Wheel 71 Sprocket 77 Chain W Plate

Claims (5)

[Claims] 1. A table device for a heat cutting machine, which supports a plate material to be cut by a heat cutting machine, comprising two or more tables on which the plate material is placed and which are provided at predetermined intervals. The table guide has a table moving mechanism for horizontally moving and vertically moving while holding the table in a horizontal state, and an overall oval table guide for movably supporting the table in horizontal and vertical directions. Two upper and lower horizontal guides, a semi-circular end guide that smoothly connects both end portions of the upper and lower horizontal guides to each other, and the upper and lower horizontal guides that can be connected to each other at the center of the horizontal guide. A table device for a thermal cutting machine, comprising an end guide and a central connecting guide having substantially the same shape. 2. The table has wheels near four corners,
The table device for a thermal cutting machine according to claim 1, wherein the wheels move along the table guide. 3. The fixed guide, wherein the central connecting guide is provided substantially parallel to the end guides at front and rear wheel intervals provided on the table, and is fixedly provided at a vertical center position. And a rotation guide rotatably provided on both upper and lower sides of the fixed guide for connecting or disconnecting the fixed guide and the horizontal guide. Table device for the heat cutting machine described. 4. A sprocket in which the table moving mechanism is provided concentrically with the end guide and at least one of which is rotationally driven by a drive motor, and the horizontal guide and the end which are wound between the sprockets. 4. A thermal cutting machine according to claim 1, wherein the guide has a chain that can rotate freely inside the guide, and the chain is attached to a wheel position on the front side in the moving direction of the table. Table device. 5. The rotating guide is rotated so as to be connected to the fixed guide after a wheel on the front side in the traveling direction of the wheels passes through a central connecting guide in which the rotating guide is in a cut state. The table device for a thermal cutting machine according to claim 1, 2, 3, or 4.